Macro-molecular leakage-free self-adhering aluminum foil and manufacturing method thereof

Abstract

A macro-molecular leakage-free self-adhering aluminum foil has two layers of aluminum foil compounded using a PET film, and the other surfaces of each layer coated with a modified PE adhesive layer respectively; or air gaps in one surface or two surfaces are filled with nano-aluminum to form a permeable air gap-free surface. The foil has advantages: 1, high folding resistance, fatigue resistance and strength 2, wrapping self-adhering performance is good, and stripping strength formed after adhesion is several times as high as that of the prior art; 3, air gaps in the surface of the aluminum foil filled with nano-aluminum powder result in improved compactness; manufacture from low-grade aluminum foil, and so that rolling precision requirements are lowered, and manufacturing cost reduced; 4, insulating strength is high, shielding effect is good, the return loss phenomenon is avoided, and tensile strength is good.

The invention claimed is: 
     
       1. A filling method for an air gap filling production line for a macro-molecular leakage-free self-adhering aluminum foil, wherein during working, a programmable logic controller (PLC) a servo motor to drive an aluminum foil reeling roll and a double-roll rolling roll in a nano-aluminum powder rolling forming device to rotate; a detected aluminum foil enters a dark box of an aluminum foil air gap detection device from the aluminum foil unreeling roll under a traction of the aluminum foil reeling roll; when a surface of the detected aluminum foil is pervious to light, a photosensitive sensor located in the dark box is triggered to transmit a location signal of an air gap in the detected aluminum foil to the PLC controller; at an instant when an aluminum foil having air gaps passes through a nano-aluminum powder spraying nozzle in the nano-aluminum powder spraying nozzle, the PLC controller instructs the nano-aluminum powder spraying nozzle in a nano-aluminum powder spraying device to spray nano-aluminum powder to air gap protections on a surface of the aluminum foil; when the aluminum foil to which nano-aluminum powder is sprayed passes through the double-roll rolling roll in the nano-aluminum powder rolling forming device, the nano-aluminum powder is compacted by the double-roll rolling roll, excessive nano-aluminum powder on the surface of the aluminum foil is removed by a surface cleaning brush, and finally the aluminum foil is reeled by the aluminum foil reeling roll. 
     
     
       2. A method for producing a macro-molecular leakage-free self-adhering aluminum foil wherein air gaps in one surface or two surfaces of a first layer of aluminum foil and a second layer of aluminum foil are filled with nano-aluminum powder to form a permeable air gap-free surface, one surface of the first layer of aluminum foil and one surface of the second layer of aluminum foil are compounded with a polyethylene terephthalate (PET) film using an adhesive, and the other surface of the first layer of aluminum foil and the other surface of the second layer of aluminum foil are coated with a modified polyethylene adhesive layer respectively;
 said method comprising the steps of: 
 1) filling at least regions of one surface or two surfaces of each of the first layer of aluminum foil and the second layer of aluminum foil with nano-aluminum powder, such that no permeable air gaps are present in the surface of the aluminum foil; 
 2) then, placing the polyethylene terephthalate (PET) film between the first layer of aluminum foil and the second layer of aluminum foil, and compounding into a whole by adhering with the adhesive; making the first layer of aluminum foil and the second layer of aluminum foil one side laminated with PET film by adhesive; and 
 3) coating a non-compounded surface of each of the first layer of aluminum foil and second layer of aluminum foil with the modified polyethylene (PE) adhesive, and drying to obtain the modified PE adhesive layer. 
 
     
     
       3. The method as claimed in  claim 2 , which comprises determining regions of the surface of layers of aluminum foil to be filled with aluminum nanoparticles by testing whether light passes through an untreated foil at a location in question. 
     
     
       4. The method as claimed in  claim 3 , wherein aluminum foil is passed into a dark box of aluminum foil air gap detection device from an aluminum foil unreeling roll under traction of an aluminum foil reeling roll; and when the surface of the aluminum foil is pervious to light, a photosensitive sensor located in the dark box is triggered to transmit a location signal of an air gap in the detected aluminum foil to a programmable logic controller (PLC); at the instant when the aluminum foil having air gaps passes through a nano-aluminum powder spraying nozzle in the nano-aluminum powder spraying nozzle, the PLC controller instructs the nano-aluminum powder spraying nozzle in a nano-aluminum powder spraying device to spray nano-aluminum powder to air gap portions on the surface of the aluminum foil; when the aluminum foil to which nano-aluminum powder is sprayed passes through a double-roll rolling roll in a nano-aluminum powder rolling forming device, nano-aluminum powder is compacted by the compacted by the double-roll rolling roll, excessive nano-aluminum powder on the surface of the aluminum foil is removed by a surface cleaning brush, and finally the aluminum foil is reeled by the aluminum foil reeling roll.